free: silence warning about unused argv

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/procps/free.c b/procps/free.c
index a941b62..473d70b 100644
--- a/procps/free.c
+++ b/procps/free.c
@@ -12,7 +12,7 @@
 #include "libbb.h"
 
 int free_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int free_main(int argc UNUSED_PARAM, char **argv)
+int free_main(int argc UNUSED_PARAM, char **argv IF_NOT_DESKTOP(UNUSED_PARAM))
 {
 	struct sysinfo info;
 	unsigned mem_unit;